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A320 fbw mod APU offsets


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I'm in the process of assigning LEDs to the corresponding functions in the A320 overhead (320Nx mod from the fbw team). atm I'm searching for the offsets of the APU Startup Sequence (another member of this forum linked a video sequence of it here: 


all I got so far, is the readout for the LED when the APU Generator (offset 0x0B52) is active (green available LED), and a short readout (Start Button LED goes on and off, because the offset reads out a float value and goes back to 0 again after it) offset 0x0B58. But I have no clue what offset could be used for the APU Master Switch LED (When the button is pressed, the LED lights up and the APU flap on the aircraft opens), and the one for the APU Starter Switch (when this one is pressed, the APU starts/spools up and the powers its Generator) so that the led stays on as long as the start up/spool up procedure is running. I tried the APU related offsets in the provided offsets spreadsheat, no luck. Thanks in advance for any help!

the corresponding fs events according to the console: 

Fuelsystem.Valve.Toggle (APU Master on/off Button ist pushed/released) Event:Contrl=67195(0x0010676), Param=8(0,00000008)

APU_Starter (APU Start pushed/released) Event:Contrl_66704(0x00010490), Param=1(0x00000001)

APU.OFF.Switch (APU Master on/off Button is pushed/released again, APU shuts down)... =66705(0x00010491), Param=0(0x00000000)

thx in advance for any help and effort! 🙂


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The SDK also lists the following sim variable:

APU SWITCH Boolean, whether or not the APU is switched on. UNITS_BOOL

However, this is not documented as being exposed vi SimConnect. I will try adding it anyway, to see if it is recognised, and will let you know.
If not, I can raise a zendesk issue to get this exposed via SimConnect.


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3 hours ago, John Dowson said:

Can you try the attached version, v7.0.4b, where I have added the following offsets:
    0x0298 1 Byte APU SWITCH



FSUIPC7.exe 594.5 kB · 0 downloads

thx John! I will try it out as soon as a get some time for it and report back afterwards.

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  • 2 weeks later...


Im currently trying to program stream deck.

I would like to have apu, pumps and batteries on the stream deck.

I cannot get it to work with simconnect.

Can this be done with fsiupc? I use spad.next for programming the buttons.




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1 hour ago, Lukas-Z said:

I would like to have apu, pumps and batteries on the stream deck.

Can this be done with fsiupc?

You should read this thread that you posted in, and also check the referenced threads, i,e,this one: 

I think you should be okay with the batteries, you can do quite a bit with the APU but I'm not sure about the full start-up sequence, fuels valves look ok but not sure about the pumps - you would need to try/test.

I'm sure there are quite a few A320Neo (both with and without the FBW mod) dlvers that also use FSUIPC7, so maybe they can help.
I could also give you a time-limited license for FSUIPC7 if you wanted to try for yourself - let me know.

For Stream Deck, there is also an FSUIPC plugin available from a user contribution: 





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